Question

1. how do these two systems interact to help maintain homeostasis?

a) the nervous system interacts with the respiratory system to control the amount of carbon dioxide in and out of the body.
b) the nervous system interacts with the respiratory system to control the brain.
c) the nervous system has no direct control over the respiratory system.
d) the amount of oxygen and carbon dioxide are indirectly controlled by the nervous system.

Explanation:

• The nervous system (specifically the brain) monitors the levels of carbon dioxide in the blood. When carbon dioxide levels rise, it sends signals to the respiratory system (e.g., to increase the rate and depth of breathing). This interaction helps maintain the proper balance of gases (homeostasis) in the body.
• Option B is incorrect because the respiratory system does not control the brain in this context.
• Option C is wrong as the nervous system does have direct control (through neural signals) over the respiratory system (e.g., the diaphragm's movement is controlled by nerves).
• Option D is not the best answer. The control of oxygen and carbon dioxide levels is quite direct (not just indirect) via the nervous - respiratory system interaction. For example, chemoreceptors in the nervous system detect carbon dioxide levels and directly signal the respiratory system to adjust breathing.

Answer:

A. The nervous system interacts with the respiratory system to control the amount of carbon dioxide in and out of the body.